Automatic fire-extinguishing sprinkler



( NoModel.)

. W. A. WILSON.

AUTOMATIC FIRE BXTINGUISHING SPRINKLER.

Patented Dec. 12, 1882.

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UNITED STATES PATENT OFFICE.

I WlLLIA NI ALEXANDER WILSON, OF NEEDHAM, MASSACHUSETTS.

AUTOMATIC FlRE -EXTINGUISHING SPRINKLER.

SPECIFICATION forming part of Letters Patent No. 268,970, dated December 1:2, 1882.

To all whom it may-concern: 7

Be it known that 1, WILLIAM ALEXANDER WILSON, of Needham, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Automatic Fire-Extinguishing Sprinklers, of which the following is a specification.

My invention relates to that class of automatic fire-extinguishing water-sprinklers in which the melting of solder by the heat of the fire allows the water under pressure to flowupon the fire so as to extinguish it.

The object of my invention is to provide a very sensitive extinguisher, so that the minimum of heat will put itin action; also to make Itcheap and of simple construction. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figurel is an elevation of the extinguisher ready for service. Fig. 2 is an elevation the plane of which is at right angles with the plane of Fig. 1. Fig. 3 is a vertical section of the same. FigAisa detail, and Figs. 5 and 6 illustrate a modification of my invention.

A-A represent a block of metal, which serves as a base for attaching my device to the water-pipe. This may be attached by a screw, as shown at A, or by any other suitable device. This base-block A A has bifurcated ears a a, as shown in Figs. 1, 2, and 5, by which the straps D D are held in place. These straps are attached to the yokeU at (J and by means of the set-screw U or any other suitabledevice; or by making the straps D D short enough a strong pressure can be made upon the cap B, thus firmly holding it in its seat a as shown in Fig. 3. To insure a tight joint I use a mixture of Vaseline and plumbago. By the use of this mixture I prevent the joints from sticking when the cap needs removing. Before adjusting the cap I apply this mixture to the cap-seat, and then, firmly pressing down the cap by means of the set-screw U, 1 press the mixture into the space between the cap and the adjacent metalinside the cap. The stronger the pressure of the water the more firmly it will press the mixture into the joint. I thus increase the tightness of the joint by the increase of water-pressure.

Attached to the upper end of the block A deflector.

Application filed October 6, 1882. (N0 model.)

A is a deflecting-disk, a attached by means of wires at a as shown in Fig. 3. This causes the water to splash in a spray upon the surface beneath, and leaves an open vent, which avoids any stoppage from sediment or other obstructions gathering in the supply-pipes.

In constructing the straps D D, I use strips of brass, which are bent round a bit of wire, D. This prevents the straps from slipping through the slots at and 0 These straps are bent open-as seen in Fig. 4. They are thensprung together and solderedwith solder me] 0- ing at about 160. By this construction I ob tain an easy separation of thejoints when the solder is melted. When a. tire starts its heat melts the solder, and,releasing the straps,the yoke G is freed trom its strain. The small amount of metal in the straps D requires but little heat to melt the solder, and a high de gree of sensitiveness is thus attained. The water-pressure then throws ofl' the cap B, and the water flows freely upon the lire.

In Figs. 5 and 6 is shown 'another form of ()n the inner surface of the block A A are two spiral flanges, M, which give the Water a circular motion in its passage from the nozzlea Thecentrifu'galforce therebyattained causes the water to form a spray on emerging from the nozzle.

I claim- 1. In combination with the block A A, the cap B, yoke U, and set of straps D D, all operating together substantially as described.

2. In combination with the block A A, the cap B, yoke C, and set of straps D D, having their ends soldered together, as and for the purposes set forth.

3. The combination of block A A, having a deflector, with cap B, yoke U, screw 0, and set of straps D D, substantially as described, and for the purpose set fOIiII. v

4. In automatic fire-extinguishers, the block A A, having bifurcated cars a a, the water-.- way of which is provided with a spiral deflec- Witnesses:

' FRANK G. PAR-KER, HELEN M. FEEGAN. 

